161719152 has 40 divisors (see below), whose sum is σ = 477457536. Its totient is φ = 46205376.

The previous prime is 161719123. The next prime is 161719169. The reversal of 161719152 is 251917161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240318 + ... + 240989.

Almost surely, 2^161719152 is an apocalyptic number.

161719152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161719152 is an abundant number, since it is smaller than the sum of its proper divisors (315738384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161719152 is a wasteful number, since it uses less digits than its factorization.

161719152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481325 (or 481319 counting only the distinct ones).

The product of its digits is 3780, while the sum is 33.

The square root of 161719152 is about 12716.8845241278. The cubic root of 161719152 is about 544.8209742206.

The spelling of 161719152 in words is "one hundred sixty-one million, seven hundred nineteen thousand, one hundred fifty-two".